SanDisk Extreme Pro SD UHS-II USB-C Reader

A memory card reader is a device for accessing the data on a

memory card A memory card is an electronic data storage device used for storing digital information, typically using flash memory. These are commonly used in digital portable electronic devices, such as digital cameras as well as in many early games conso ...

such as a

CompactFlash CompactFlash (CF) is a flash memory mass storage device used mainly in portable electronic devices. The format was specified and the devices were first manufactured by SanDisk in 1994. CompactFlash became one of the most successful of the e ...

(CF),

Secure Digital Secure Digital (SD) is a proprietary, non-volatile, flash memory card format developed by the SD Association (SDA). Owing to their compact size, SD cards have been widely adopted in a variety of portable consumer electronics, including digi ...

(SD) or

MultiMediaCard MultiMediaCard, officially abbreviated as MMC, is a memory card standard used for solid-state storage. Unveiled in 1997 by SanDisk and Siemens, MMC is based on a surface-contact low-pin-count serial interface using a single memory stack subs ...

(MMC). Most card readers also offer write capability, and together with the card, this can function as a pen drive. Some

printers Printer may refer to: Technology * Printer (publishing), a person * Printer (computing), a hardware device * Optical printer for motion picture films People * Nariman Printer (fl. c. 1940), Indian journalist and activist * James Printer (1 ...

and

Smartphone A smartphone is a mobile phone with advanced computing capabilities. It typically has a touchscreen interface, allowing users to access a wide range of applications and services, such as web browsing, email, and social media, as well as multi ...

s have a built-in card reader, as do many

laptop A laptop computer or notebook computer, also known as a laptop or notebook, is a small, portable personal computer (PC). Laptops typically have a Clamshell design, clamshell form factor (design), form factor with a flat-panel computer scree ...

s and the majority of

Tablet computer A tablet computer, commonly shortened to tablet, is a mobile device, typically with a mobile operating system and touchscreen display processing circuitry, and a rechargeable battery in a single, thin and flat package. Tablets, being computers ...

s. A multi card reader is used for communication with more than one type of flash

. Multi card readers do not have built-in memory capacity, but are able to accept multiple types and styles of memory cards. Memory card readers, unlike smartphones, telephones and other devices, such as cameras and digital cameras, allow formatting in a file system other than FAT (FAT16, FAT32, exFAT) to NTFS in Windows, ext, ext2, ext3 in Linux or HFS, HFS + for Mac OS. Smartphones or other devices like cameras format them only in FAT. Internal card readers are usually connected to internal USB 1.1 / 2.0 / 3.x ports The number of compatible memory cards varies from reader to reader and can include more than 20 different types. The number of different memory cards that a multi card reader can accept is expressed as x-in-1, with x being a

figure of merit A figure of merit (FOM) is a performance metric that characterizes the performance of a device, system, or method, relative to its alternatives. Examples *Absolute alcohol content per currency unit in an alcoholic beverage *accurizing, Accuracy o ...

indicating the number of memory cards accepted, such as 35-in-1. There are three categories of card readers sorted by the type and quantity of the card slots: single card reader (e.g. 1x SD-only), multi card reader (e.g. 9-in-1) and series card reader (e.g. 4x SD-only). Some kinds of memory cards with their own USB functions do not need the card reader, such as the Intelligent Stick memory card, which can plug directly into a USB slot. The USB device class used is . Modern UDMA-7 CompactFlash Cards and UHS-I Secure Digital cards provide data rates in excess of 89 MB/ s and up to 145 MB/s, when used with memory card readers capable of USB 3.0 data transfer rates. As of 2011, Secure Digital memory cards received an additional option of a UHS-II bus interface. It increased the maximum data transfer speed to 312 MB/s. SanDisk-memory-card-reader.jpg, USB card readers like this one typically implement the

USB mass storage device class The USB mass storage device class (also known as USB MSC or UMS) is a set of computing communications protocols, specifically a USB#Device_classes, USB Device Class, defined by the USB Implementers Forum that makes a USB device accessible to a h ...

Cfcrusb2.jpg, Generic

card reader with high-speed storage via USB2.0 FDD-Cardreader.jpg, Cardreader combined with

floppy disk A floppy disk or floppy diskette (casually referred to as a floppy, a diskette, or a disk) is a type of disk storage composed of a thin and flexible disk of a magnetic storage medium in a square or nearly square plastic enclosure lined with a ...

drive NV-PE150PSU CF Card Reader 91689 (cropped).jpg,

PCIe PCI Express (Peripheral Component Interconnect Express), officially abbreviated as PCIe, is a high-speed standard used to connect hardware components inside computers. It is designed to replace older expansion bus standards such as Peripher ...

1x eSATAp controller card with

memory card reader

References

{{DEFAULTSORT:Memory Card Reader Solid-state computer storage media USB

See also

References